Urea-formaldehyde-acid-amine cocondensation products and process of making the same



Patented Oct. 28, 1941 UNITED STATES PATENTJ OFFICE 1 UREA-FORMALDEHYDE -ACID -AM1NE O- CONDENSATION PRODUCTS AND PROCESS OF MAKING THE SAME Almon G. Howey, Birmingham, and Theodore S.

Hodgins, Royal Oak, Micln, assignors to Reichhold Chemicals, Inc., formerly Beck, Koller & Company, Inc., Detroitliiich.

No Drawing. Application March 19, 1941,

. SeriaiNc. 384,134

11Clalms.

The invention relates to co-condensation products formed by reacting urea, formaldehyde, a polyfunctional organic acid and an organic amine, and to the process of making the same, wherein the reaction takes place in the presence of a solvent. The present application is a continuation-in-part of our prior application Serial No. 247,988 filed December 27, 1938.

We have in our Patent No. 2,109,291 dated February 22, 1938, described the preparation of certain modified urea-formaldehyde condensation products suitable as coating compositions, and in our applications Serial Nos. 203,149 filed April 20, 1938, and 237,578 filed October 28, 1938, now Patents Nos. 2,221,708 and 2,228,518, we have described certain modified dimethylutes from 100-190'' C., yielding a pale straw colored resinous product having a cure of 29 seconds on the hot plate at 200 C. This resin was insoluble in water, acetone, toluol and mineral spirits, but soluble in alcohol.

(b) 50 parts by weight of the product described in (a) was reacted with 84 grams of a urea-formaldehyde-butanol resin for one hour at 120-130 C. producing a pale straw colored resinous product having a cure of 8 seconds on the hot plate at 200 C. The resulting resin was insoluble in water and mineral spirits, but soluble in acetone, alcohol and toluol. This prodolurea and urea-formaldehyde products. andwith reaction products of the urea-formaldehyde type, such as dimethylolurea and solvent modified urea-formaldehyde products. The present application is concerned principally with the less mentioned reaction products and the process of producing the same. I

The solvent employed may be either active or inactive, but achemically reactive solvent, such as a monohydric or polyhydric alcohol as was described in our original application Serial No. 237,578, is preferred. The condensation may be carried out in one or more stages as set forth in our application Serial No. 247,988 but preferably a preformed solvent modified urea-formaldehyde resin is reacted with a resin formed by reacting a. polyfunctional organic acid with an organic amine.

The invention will be more readily understood by reference to the accompanying specific examples which are intended as illustrative only and not as limiting the invention to the particular details set forth therein.

Example 1 (a) One mol of benzoylbenzoic acid was reacted with one mol of isobutylamine for 30 minuct because of its pale light color and fast heathardening characteristics may be used for producing hard colorless enamels.

Example 2 (a) One mol of adipic acid was reacted with one mol of dioctylamine at 136-270 C. for 30 minutes. The resulting water-white resin had a cure of 25 seconds on the 200 C. hot plate. This product was insoluble in water, and soluble in acetone, alcohol and toluol, and to a limited extent in mineral spirits.

(b) 50 parts by weight of the resin described in (a) was reacted with 84 parts of a urea-formaldehyde-butanol resin for one hour at -130 C. The resulting pale straw to water-white product had a cure of 27 seconds on the hot plate at 200 C. The resin was insoluble in water, but

soluble in acetone, alcohol, toluol and mineral spirits.

we claim:

1. A process which comprises heat reacting an alcohol modified urea-formaldehyde resin with the resin formed from a polyfunctional carboxylic acid and'an organic mono-amine, said ureaiormaldehyde resin and acid-amine resin constituting the principal reacting ingredients.

2. A resinous product formed by heat reacting an alcohol modified urea-formaldehyde resin with the resin formed from a polyiunctional carboxylic acid and an organic mono-amine, said urea-formaldehyde resin and acid-amine resin constituting the principal reacting ingredients.

3. An artificial resin formed by heat reacting a butanol modified urea-formaldehyde condensation product with the resin formed from a polyfunctional carboxylic acid and an organic mono-amine, said urea-formaldehyde resin and acid-amine resin constituting the principal reacting ingredients.

4. An artificial resin suitable for use in coating compositions and the like formed by heat 2 a l s,se1,oas

A resinous reaction product as set forth in claim 2 wherein the acid-amine esin is derived from benzoylbenzoic acid and iso utylamine.

, 9. A resinous reaction product as set'forth in- 5 claim 2 wherein the acid employed in the production of the acid-amine resin is adipic acid.

10. A resinous reaction product as set forth in claim 2 wherein the amine employed in the production of the acid-amine resin is dioctylin claim 2 wherein the acid employed in the 10 amine.

production of the acid-amine resin is benzoylbenzoic acid.

7. A resinous reaction product as set forth in claim 2 wherein the amine employed in the production of said acid-amine resin is isobutylamine. 15

11. A resinous reaction product as set forth in claim 2 wherein the acid-amine resin is deriyed from adipic acid and dioctylamine.)

ALMON G. HOVEY. THEODORE S. HODGINS. 

